LU-2836 quota: improve test_3 & test_6 of s-q

When approaching quota limit, client turns to sync write, then the
tests which assume io can be finished quickly could fail, we need
to enlarge the time margin to make sure those tests can pass on slow
system.

Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Change-Id: Ib14a905344eb78cdbd0cd79e3bfd8e50ab21a4d8
Reviewed-on: http://review.whamcloud.com/5539
Tested-by: Hudson
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
LU-2424 ptlrpc: reduce initial buffers count

Separate buffers count for server and client services.
Reduce inititial allocation for client ("ldlm_cbd") because
its not required a lot. This reduced unreclaimable memory
usage after just mount from 233036kB to 97386kB.

Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Change-Id: I56fcbe6c45c61ba4876bce5482169ea06a03638c
Reviewed-on: http://review.whamcloud.com/5719
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>